Polymorphic Crypter

Hello,I would like to get your thoughts about how much would a real polymorphic crypter sell for? Either per stub or monthly subscription.

Don't know what a polymorphic crypter means?

♦ Such a crypter means a code that uses a polymorphic engine to mutate while keeping the original algorithm intact. That is, the code changes itself each time it runs, but the function of the code (its semantics) will not change at all.= = =♦ Crypter will have a startup option, fileinfo cloning and icon change.♦ Coded in Delphi with Inline ASM.

it wouldnt be that much of a use in todays world, where antiviruses have heuristics analyzing to find and destroy threats.
im guessing that a per-stub basis wouldnt sell as well as the actual crypter, so around 30$ for the crypter
dont kill me if im wrong tho